docs: def _get_fault_type_dummy_variables(self, rake):
          """
          Defines the fault type dummy variables for normal faulting (f_n) and
          reverse faulting (f_r) from rake. Classification based on that
          found in the original fortran code of Lin (2009)
          """
          f_n, f_r = 0, 0
          if rake >= -120 and rake <= -60:
              # normal
              f_n = 1
          elif rake >= 30 and rake <= 150:
              # reverse
              f_r = 1
          return f_n, f_r